JPS58166216A - Wiring board printed with resistor for detecting sensor of liquid volume - Google Patents

Abstract

PURPOSE:To prevent the generation of defective conduction phenomena by using conductor paste and resistor paste which are covered with a vitrified material larger than >=3mu diameter and do not produce any projection on the surfaces of an earth circuit and resistance circuits after baking. CONSTITUTION:A sensor for displaying the volume of the gasoline in an automobile utilizing the change in resistance value by sliding is shown. The contact point 7 which is so set as to indicate prescribed pressure by spring pressure is moved vertically on the display surface of a circuit, and the resistance value varies with the distance from a base point; for example, the resistance values increase curvilinearly as said point moves to positions R1, R2, R3, R4, R5. In the figure, a substrate 1, a screw mounting hole 2, a conductor 3 which is an earth circuit for sliding a contact point, a conductor circuit 4 for soldering, a resistance circuit 5 using low resistance paste, and a resistance circuit 6 using high resistance paste are shown.

Description

[Detailed description of the invention] The present invention a-mount contact terminal or resistor - when carrying weight on the road & Jai1
Resistance printing layout fH#LK for the 1-piece design of Isumi Chichi Seven Sensors
IM! do.

Can be used as a sensor for displaying gasoline meters! Paste nickel 1kiI# anti-foil on the sheet plate with a folding agent 9, etching it and attaching it. [K 1-z
However, from a responsible point of view, Hatakeso decided to add alcohol to gasoline in order to reduce dependence on petroleum. Since so-called gasohol is used, the image layer agent 1/J# may have holes due to the gasohol property. The mold layer agent swells and the image layer force O decreases and Wh
It produces an O-shaped shape and is not practical for practical purposes. υ
The glass 'jL or #-integrated *Explained layer strength decreases and disappears into a 7t, Liao m printing-paste 19 The circuit created, due to its nature, is porous and has an uneven surface. When there is a protrusion covered with glass, the resistance i1 shown by the folds is abnormally large (meter #)'3.
#11 To display the large width Ksb weight, the main 4) C and 'm turned out to be 90 yen 111! There is a jig 11mK in the gasoline fuel display senna of a car using the US, and there is a contact point set to indicate the current pressure with the force of a spring as shown in the second figure. Move the 1g circuit table up and down (
(Contact point or 20- set name n to 2, F rises when refueling, descends when used) Distance from base point KA, p, resistance s4
v * For example, as we move from R1゜R, Rn, R, R, and R, the resistance increases exponentially. Hole, 5 is ground circuit for ground sliding (conductor), 4 is Hayade conductor circuit, sr
It is an r-resistance circuit (low sheet resistance based/receptive), a 6σ resistance circuit (using IL16 sheet resistance paste), and 70 contacts.

When the pleat contact terminal is moved in the direction of the earth path and the resistance circuit, a resistance OX: 0, that is, a conduction failure t'' occurs instantaneously. When p is increased,
The meter display clearly shows the gasoline/residual weight in the tank! 14, the dovetail shows μ, zea'2 and is practically rmm.The cause of this T#4-1- Insulating foreign substances such as glass fibers, insect spears, etc. that are resistant to the printing paste surface from the environment. It was found that there is a slight influence, but it is difficult to eliminate conduction defects. - Electron microscope - Comparing the photo purchase and the presence of conduction defects mυ, it was found that 4 defects occurred - on the contact surface. Diameter 5
Mix the thick film paste with gold S + metal oxide*υ mold powder t glass powder, disperse it in #I copper agent, and dry it with 7t% eJ. - When the circuit is made into a circuit, if there are relatively large protrusions that are covered with glass due to the presence of coarse particles, it will be difficult to
II or large rounded contact layer or IZJ lift 4 failure 7 looseness occurs 0 One advantage of this invention is that it is n scale t, so the earth circuit is printed and fired on the cylindrical base of 4 pieces. , resistor pace) 1 In the resistor printed circuit board for a low-power detection sensor that also contains a printed resistor circuit, the 5fIIIi Seitoshi rear circuit and the -thlK of the resistor circuit were covered with a glass material with a diameter larger than 5 μm. A conductor paste and a resistor paste that do not produce protrusions.
In other words, by using 41F paste and resistance paste, which show uniform roughness and tJ markings on unexploded 1IIj, 4.
There is o″C.

Using this ctJ process, body 5 paste, and resistance paste, print a circuit pattern such as ``Hiro-fi'' and ``Seraic bridge mold'', and then bake it in the usual manner to create a 7-su & 1IJ.
116. It is possible to form a resistor circuit. In addition to the above-mentioned work, in the present invention, the contacts can be moved on the circuit.
It is possible to make a highly reliable resistor wiring for image point sliding sea bream that does not cause any defects.In addition, an uninvented part base that does not cause conductivity defects or sounds. The soldering properties, which are always a problem with thick circuits, are also improved, and reliable connections with parts can be achieved. ◎4. Similar V direction map, image point in Figure 2 @
llo diagram.

After F extra mill Explanation of symbols 1 Todoroki 41i2 Screw mounting hole 7 contacts

Claims (1)

[Claims] 1, 2Jli work, the conductor paste wire is finely formed with ground 1 and the resistor paste) 1-mark M4 body is formed into the next resistance circuit kilF&L, and the resistor printed wiring for the resistance sensor.
At the ridge, there is no conductor paste and a K body base) that does not have a protrusion covered with a large glass layer of 6μm on the surface of the resistor & gl road V) kR4VH violet detection sensor Resistor printing arrangement IA board ◎